缓动点目标的流水线检测算法

讨论了复杂背景下缓动点目标的流水线检测算法。通过两个流水线,分割流水线和检测流水线,可以用１５帧图像满意地检测出目标。对算法的性能和实验结果作了分析。     

飞行器易损性指标计算的基本理论与方法(Ⅰ)

给出了与易损性指标计算有关的一些基本概念,推导了在单击中情况下无余度非重叠模型、无余度重叠模型、余度非重叠模型、余度重叠模型４个模型及其相应的易损性指标计算公式。若干算例说明了方法的有效性。     

坦克发动机技术状况的两种模糊诊断模型

提出了诊断坦克柴油机技术状况的模糊综合模型和模糊模式识别模型。对59坦克柴油机的技术状况进行了诊断计算,证实了这两种模型的实用性和可靠性。     

一种基于NASTRAN无限元技术的导管声学计算方法

为了更好地研究水下导管声学问题,提出了一种基于NASTRAN无限元技术的导管声学计算方法。该方法可用于任意多连通域问题的声场预报,适应任意复杂的导管截面和形状,并能考虑导管壁的弹性振动。对该方法进行了数值验证,并研究了无限元计算参数的设置,结果表明:径向插值阶数对计算结果的影响很大,而无限元边界位置和形状对结果的影响较小。采用该方法研究了管壁振动对空气中和水下导管声场的影响,结果表明:空气中导管可以不考虑管壁的流固耦合振动,而水下必须考虑。     

军品市场营销工具的探索性研究

随着我国军品市场竞争机制的引入,军工企业开始需要现代营销理论指导其在竞争中赢得客户。而由于军品市场的特殊性,一般商品市场上的4P营销组合战略已不适用。本研究在对多年从事军品销售工作经验总结的基础上,深入研究了现代营销理论,汲取其中的精髓,针对军品市场的特殊性,对军品市场的营销分析工具进行了探索性研究,提出了通过对实力(Capability)、价值(Creation of value)、关系(Connection)和信誉(Credit)四个维度来分析和指导军品营销工作的4C模型。     

Background dominant colors extraction method based on color image quick fuzzy c-means clustering algorithm

A quick and accurate extraction of dominant colors of background images is the basis of adaptive camouflage design. This paper proposes a Color Image Quick Fuzzy C-Means (CIQFCM) clustering algorithm based on clustering spatial mapping. First, the clustering sample space was mapped from the image pixels to the quantized color space, and several methods were adopted to compress the amount of clustering samples. Then, an improved pedigree clustering algorithm was applied to obtain the initial class centers. Finally, CIQFCM clustering algorithm was used for quick extraction of dominant colors of background image. After theoretical analysis of the effect and efficiency of the CIQFCM algorithm, several experiments were carried out to discuss the selection of proper quantization intervals and to verify the effect and efficiency of the CIQFCM algorithm. The results indicated that the value of quantization intervals should be set to 4, and the proposed algorithm could improve the clustering efficiency while maintaining the clustering effect. In addition, as the image size increased from 128 × 128 to 1024 × 1024, the efficiency improvement of CIQFCM algorithm was increased from 6.44 times to 36.42 times, which demonstrated the significant advantage of CIQFCM algorithm in dominant colors extraction of large-size images.     

Effect of the end cap on the fragment velocity distribution of a cylindrical cased charge

The prediction of the fragment velocity distribution of a cylindrical cased charge with end caps is one of the key issues to assess the damage efficiency of the warhead. However, limited work has been con-ducted to predict the fragment velocity distributions along the axis of cylindrical cased charges with end caps. This paper presents a study of the velocity distribution of fragments caused by the explosion of a cylindrical cased charge with end caps. The fragment velocity distribution and the end cap velocity were determined by an X-ray radiography method, and the axial fragment distribution was determined by witness plates. It was found that the velocities of fragments, especially near the edge, were increased when the end caps were added, and the position of maximum velocity is closer to the non-detonation end. The fragment velocities were increased, and the fragment projection range was decreased with the increase of the thickness of the end cap. A formula for fragment velocity distributions of a cylindrical cased charge with end caps, which is based on Huang's formula, was proposed by the theoretical analysis and data fitting and validated experimentally. The results indicate that the proposed formula is accurate in predicting the fragment velocity distribution along the axis of a cylindrical cased charge with end caps detonated at one end.     

变距离静电电位检测研究

针对现有非接触式静电检测装置存在检测距离近且距离固定等问题,提出了对电位测量进行距离补偿的变距离静电电位检测方案。首先,从电位测量的基本原理出发,分析了距离测量误差与电位测量误差的关系,验证了精确测距的重要性,即要满足电位测量相对误差σV≤±10%,所选测距方式的距离测量相对误差-4.65%≤σd0≤5.41%的技术指标。然后,通过实验研究了检测距离与感应电位的关系,验证了0.5 m内对静电电位变距离测量的可行性,得到了对电位测量进行距离补偿的公式雏形Vs(V a,d)=Va(a+bd)c。依据此公式雏形以及大量的重复实验,可以得到公式中的各项参数值,编入单片机可实现对静电电位的变距离检测。     

国防工业企业生产安全事故应急管理能力评估方法标准化的探讨

介绍了安全生产事故应急管理能力及其评估要求,分析了国内外应急能力评估的现状,提出了建立国防工业企业安全生产应急管理能力评估方法的必要性和途径。     

一般模型的核函数

基于Ｖｏｌｔｅｒｒａ理论和Ｗｉｅｎｅｒ理论,较为系统地研究了连续与离散时不变一般模型及其在有外部扰动情况下的Ｖｏｌｔｅｒｒａ核和Ｗｉｅｎｅｒ核的计算方法,并给出计算结果与数值模拟算例。